/Engine/Plugins/MeshPainting/Source/MeshPaintingToolset/Public/MeshPaintHelpers.h
Computes the Paint power multiplier value
float ComputePaintMultiplier ( float SquaredDistanceToVertex2D, float BrushStrength, float BrushInnerRadius, float BrushRadialFalloff, float BrushInnerDepth, float BrushDepthFallof, float VertexDepthToBrush )